// Bristleback plugin - Copyright (c) 2010 bristleback.googlecode.com
// ---------------------------------------------------------------------------
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by the
// Free Software Foundation; either version 3 of the License, or (at your
// option) any later version.
// This library is distributed in the hope that it will be useful,
// but without any warranty; without even the implied warranty of merchantability
// or fitness for a particular purpose.
// You should have received a copy of the GNU Lesser General Public License along
// with this program; if not, see <http://www.gnu.org/licenses/lgpl.html>.
// ---------------------------------------------------------------------------
package pl.bristleback.server.bristle.utils;

import org.apache.log4j.Logger;
import org.jwebsocket.api.WebSocketPacket;
import org.jwebsocket.config.JWebSocketCommonConstants;
import org.jwebsocket.config.JWebSocketConfig;
import org.jwebsocket.packetProcessors.CSVProcessor;
import org.jwebsocket.packetProcessors.JSONProcessor;
import org.jwebsocket.packetProcessors.XMLProcessor;
import org.jwebsocket.token.Token;

/**
 * Util for packet and token processing taken from original jwebsocket framework grouped in one class.
 * <p/>
 * Created on: 2010-09-24 22:40:39 <br/>
 *
 * @author Wojciech Niemiec
 */
public final class PacketProcessingUtil {
  private static Logger log = Logger.getLogger(PacketProcessingUtil.class.getName());

  private PacketProcessingUtil() {
    throw new UnsupportedOperationException();
  }

  public static Token processPacketToToken(WebSocketPacket packet, String protocol) {
    Token lToken = null;
    if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_JSON)) {
      lToken = JSONProcessor.packetToToken(packet);
    } else if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_CSV)) {
      lToken = CSVProcessor.packetToToken(packet);
    } else if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_XML)) {
      lToken = XMLProcessor.packetToToken(packet);
    }
    return lToken;
  }

  public static WebSocketPacket processTokenToPacket(Token token, String protocol) {
    WebSocketPacket packet = null;
    if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_JSON)) {
      packet = JSONProcessor.tokenToPacket(token);
    } else if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_CSV)) {
      packet = CSVProcessor.tokenToPacket(token);
    } else if (protocol.equals(JWebSocketCommonConstants.WS_FORMAT_XML)) {
      packet = XMLProcessor.tokenToPacket(token);
    }
    return packet;
  }

  /**
   * Process token to packet using protocol defined in jwebsocket configuration file.
   *
   * @param token token
   * @return packet representation of token
   */
  public static WebSocketPacket processTokenToPacket(Token token) {
    return processTokenToPacket(token, JWebSocketConfig.getConfig().getProtocol());
  }
}
